drt: mark routed nets as 'unordered' (ie order_wires is needed)

Fixes The-OpenROAD-Project#4345

Signed-off-by: Matt Liberty <mliberty@precisioninno.com>

src/drt/src/io/io.cpp

@@ -3204,6 +3204,7 @@ void io::Writer::updateDbConn(odb::dbBlock* block,
         }
       }
       _wire_encoder.end();
+      net->setWireOrdered(false);
     }
   }
 }